Question: For what pharmaceutical product is niacin the active ingredient?
Paraphrase: Niacin is the active ingredient of what pharmaceutical product?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q134658 wdt:P3780 ?obj . ?obj wdt:P31 wd:Q28885102 } 
Answer: Niaspan, B3-500-Gr, Niacor